Spinner Weapon Motor Discussion

Yeah ill try and mill some of the angles down , some of the screw heads holding the gearbox together are stripped so ill have to drill into the old stripped gears and buy new screws the match the thread size . Thanks for the advice James

Alister if the mod is indeed 0.75 then as far as i can see, you have 2 options.

1) Chuck the 0.75 gears and buy some new ones
2) Get a drill gearbox, tear it open and see if there is anything usuable in it.

Yes the total ratio will be 9:1

I think its a nice setup as long as everything is aligned properly and secured well in place. You will just have to make sure that both motors are spinning in the right direction! Could get messy otherwise.

Thanks for the advice gary , i have a knackerd gearbox some where , see if there is any usable gears inside it , BTW is your feather ready to go yet ? My robot just has to get some Nimh in it and wired and its ready .

Its far from finished. I have to put the new 12v golds in, put my new pancake motor for the disc and buy some new nicads.

Hey Alistair, just thought of something. Why not see if you can get some metal meccano gears of the right size. Ok, they may be brass and might well strip, but its worth a shot.

http://secure.meccanoshop.co.uk/index.html?http%3A//secure.meccanoshop.co.uk/Spare_Parts.html&CatalogBodyhttp://secure.meccanoshop.co.uk/inde...shop.co.uk/Spa re_Parts.html&CatalogBody

Im in the stage of designing a drum robot for 2006 . I have the basic design laid out. I was going to have drum endcaps at each side of the drum and bearings would be push fitted into the end caps . I also plan on using timing belts for the spinning of the drum . Can i have some suggestions on some motors that may be suitible for the weapon motor , i dont want to go overboard with something like astro 40 s or anything like that , just low cost but good performance .
Im also wondering about a motor that i bought off of ebay a few weeks ago , it is made by johnson and lloks like a mini ev but about twice as big and runs on 25v , anybody tried this motor ?

supply a pic please

On Kishar we have 2 HTI motors running the disc at 24v. At the last event against Dragon 2 it bent the Hardox (4mm) side armour on Dragon 2. Oh and we are going to try 3 HTIs on Kishars disc which will give it around 4.3 hp hopefully in time for Magna.

12v golds..... on 24v
very simple and easy, bit heavy, not that cheap at £25, but still...

or car fan motors, £5 from the scrapyard, on 24v you get serious power

http://img156.imageshack.us/img156/5724/sa4000750aa.jpghttp://img156.imageshack.us/img156/5724/sa4000750aa.jpg
http://img156.imageshack.us/img156/2976/sa4000795im.jpghttp://img156.imageshack.us/img156/2976/sa4000795im.jpg
Pics of the motor

Looks like a bog standard 850 sized motor to me. the 850 isnt twice the size of a mini EV though, it has virtually an identicle casing. They run ok at 12v, but Ive also tried at 18v - it smelt pretty bad then.

Go for an HTI or similar (24v drill motor perhaps?) if you have the space to gear about 4 or 5 to 1 (will get better torque/speed to weight ratio then), otherwise a lower revving motor like a gold/fan motor as James suggested would be good.

The Johnson i mention was about twice the size of a normal drill motor , and it even says 24V on the side or it , It is my luck that i have 2 24v drill motors that came from hammer drills that could be useful .

woud this be a good spinner motor?? http://img206.imageshack.us/my.php?image=dsc017714ul.jpghttp://img206.imageshack.us/my.php?i...sc017714ul.jpg

its a 12v bosh motor from a car fan,

yeah car fan motors are usually quite good.

Alister, what happened to the pancake motor I sold you?

How many HTI motors do you guys burn out? We have 6 dead ones here.
I think you are better off going with mini-EVs. The are cheaper and when run off 14.4 volt they go just as well as a HTI. With the added bonus the you only need 14.4V worth of batteries which will save weight over 24V.
2 mini-EVs made Prancing Queen a damn scary robot. And the one in Vertical Limits is also impressive. They deffently have a much better combat record here then the HTIs.

Gary , sold it to James Baker , didnt fit into my new design

As of now none. We run the HTIs from a astroflight speed controller. We have took readings of the voltage the motor pulls at different stick positions. We run it at 12v for most apponents but give it full stick for the robots with Ti or Hardox Armour. And up to now we have not burned a motor out.

yeah gary, i bought the pancake from alistair so that with the 3 you sent me id have 4, shame eh? thanks to parcelforce ill be stuck with just 1, unless they loose that one too... sent it yet alistair?

James, did you not get my email about your neighbour?

yep, did you gt my reply?
they are trying to fob you off.
no house on my estate has a name, they are all numbered.
if they had left it with a neighbour there is a box on the delivery note to say so, never got one.
the motors had no address on them, so how were they delivered without the hardox? if sent specially they would have told us, or taken them to the po i picked the hardox up from.
and finally, if the neighbour has it, they do not need to pay up on the insurance.... thats why they are saying it. ask for the address off the neighbour, ask for a signiture, and ask for the time and date of this supposed delivery.
my neighbours know all about my robot stuff deliveries, and would have told me if they had anything, they always do.

they are trying to pull a fast one.

A note to everyone else, trust nothing parcel force say

I use Parcel 2 go, good rates and very reliable

...Parcel Farce

Dont know if Geoff can add anything to this - being a postmaster an all !

Ed
http://www.teamstorm.com

Yep, Parcel Farce...that just about says it all!!
Seriously, if you feel there is a problem with the service, ring their customer helpline on...
08708 501150
Failing that, if you want to take things further you can contact the regulating authority, Postwatch, on...0845 6013265

I am currently trying to persue a claim and somehow I have a feeling that they will try every trick in the book to get out of paying.

Anyway, back to the topic at hand, spinner motors!

Now have 3 HTI motors powering Kishars Disc. 2 motors bent the 4mm Hardox on Dragon 2 wonder what 3 will do. Pic on profile.

Tony,
You and I have got to have a serious talk about weapons drives!..This is starting to get silly! :proud:

**Waits for Geoff to install 3 Astroflights into Scorpion Jr**

Well Jeff we have another 4 HTIs spare.

Well Jeff we have another 4 HTIs spare.

oops

What gear ratio/rmp are you running them at Tony, still 5:1?

Chris - ^_^

(Message edited by Robotic_Ants on February 18, 2006)

Yes we are still running at 5:1.

what about a lem130 with a 1:4 ratio?

James, what does it spin?
It sounds like its acting like the pole axle or what?

I should hope the chassis is stronger then your last spinner James, and ALOT safer to handle.

eh? nothing wrong with my last spinner dave, it never broke.
assuming you are reffering to tantrum as its the only spinner of mine you have seen, and only one of the 16 featherweight spinners ive built.
and no, none of them broke either, well, ive had no complaints anway.
:)

Rather than opening a new thread ill just post here
I have been on a bit of a break from robots and after seeing some videos of recent events it has rekindled my interest . I am making a drum spinner - nearly all the components are gathered and just need to be machined . My main concern is the drum and the bearings . Should I have the bearings inside the drum with a stationary shaft OR should i have the bearings in the bulkheads and a stationary shaft connected into the drum ? I can see both ways have its up and downside but i cant really pick one. Any suggestions ?

My drum has bearings in the drum with a fixed axle, if this helps.

Fixed axle, because of the pure reason that being fixxed in place adds to the chassis strength. Might not be improtant in your design but it was needed in Conundrum,

Chris - ^_^